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This common, dark brown to blackish, crustose species occurs mostly on the surface of sandy or peaty soils associated with heathy ground; it is also recorded from rotting wood. The thallus, which is C-, is seen as a dark brown crust of tiny spherical granules that turns green when moist. Discs are common, very often abundant. They are brown with a darker margin which is excluded as the disc matures and becomes convex. The species is restricted to the drier soils of eastern Ireland.

Key characteristics

• The C- thallus, and spherical granules distinguishes it from most other similar species